Expansion-bolt.



c. J. cLEMENTs; EXPANSION BOLT.

APPLICATION FILED AUG. 10, 1907.

906,510. Patented Dec. 15,1908.

l/mtueooa "vent z .5. I :va We 149 EXPANSION-BOLT.

Application filed August 10, 1907.

Specification of Letters Patent.

Patented Dec. 15, 1908.

Serial No. 387.972.

To at], who) it may concern:

Be It. known that l, (humus J. (1.m1nx'rs, a. (lllZQli ot the Unlted States, and resident.

v of the borough of Brooklyn, c.ount v of Kings,

city and State of New York. have invented certain new and useful Improvements in lCxpansirm-Bolts, of which the following is a specification, accompanied by drawings.

This invention relates to expansion bolts for use in stone, brick work and the like, and the objects of the invention are to improve upon the construction of such devices and render them stronger and more ellicient in use than heretofore.

The invention consists of the expansion bolt substantially as hereinafter fully described and claimed in this specilication and shown in the accompanying drawings. in whicln Figure 1 is a longitudinal sectional view taken through an expansion bolt embodying the invention: Fig. 2 is a transverse sectional view on the line .2: a: of Fig. l. looking in the direction of the arrows.

Referring to the drawings the expansion bolt is shown in section in l 1g. 1 adapted to be exp: nded in a recess A in the ln'ickwork or masonry it. and is the plate or other dcvice adapted to be secured to the masonry.

l) and l l re 'n'csent the halves of the longitndinallv divided shell or cartridge and l is the bolt proper. The divided shell is provided with a central tapered bore constructed by tapering the interior of each of the shell portions l) and i l as shown. (ooperating with the tapered shell portions is the rever elv tapered split wedge comprising the two halves (i and ll, which wedge is adapted to be etpanded inside of the cartridge and force the shell portionsl) and l) tuitwardlv into engagement with the sides of the recess A. Preferably the outer sides of the shell portions of the cartridge are provided with teeth or serrations l for engagement with the masonry or other materialv and a split band J is preferabl priwided around the cartridge, and (()1ll} ll(l5tllll in the shell portions for holding the parts together. bore of the split wedge inside of the cartridge screw-tbreaded to cooperate with the screw threads on the bolt 1, so that by screwing up the bolt the split wedge expands the cartridge.

The portions (,i and ll of the wedge 'or nut are provided with lugs ii and l), cot'iperating with grooves and l in the interior portions of the cartridge, so that the wedge is prevented from turning. Preferably the lugs K and it and grooves are so located inside of the shell portions of the cartridge that the split portions or meeting edges of the halves of the wedge do not fall opposite the meeting edges of the 'artridge as illustrated in Fig. 2, thus making a ver v strong construction.

According to this invention it will be seen The interior that the cartridge is continuously expanded.

due to the reverse taper of the cartridge bore and the split wedge or nut. and this feature is a great advantage because the. cartridge can be tightened up as fully as desired. and the limit of the expansion is not reached within a few turns of the bolt. as in expansion bolts heretofore ctnistructed in which the bore of the cart ridge is made straight instead of tapered.

l claim and desire to obtain by Letters Patent. the following:

.\n expansion bolt cotn 'irising an interior-l) tapered shell composed of longitudinal sections and an exterior-iv tapered nut composed of longitudinal sections, a groove and lug connection between each nut and shell sections. flit sections of the. hell being 111'- ranged to l)izll( joint with the sections of the nut. and means for moving said nut to ex pand said shell.

in testimony whereof [have signed this specification in the presence of two subscribing witnesses.

(llARlilCS .l. ("LEM )N'lh.

\Yitnesses:

W. M. hnonx, i A. Axoicnsox. 

